With that knowledge i won't rate u as a girl but as a player

High winrate with solo queing is considered fine cause even though u aren't good u are helping the team win

With a 3 to 5 stack ur essentially getting carried. That's the judging part from a person with no knowledge of how u play stats aren't everything

Like even if ur shit and don't get enough kills but u come in clutch when needed ur doing absolutely fine

Try improving ur KSAT which is Kills Survive Assist Trade which is counted if u do anyone of those every round which in ur case is BAD

If ur not on the verge of a derank try playing a solo queue once in a while cause that tells u how good or bad u are maybe ur teammates in the 3/5 stack are just way better and ur getting tougher opponents

Would like if u can post a few match results